Threading machine



Feb.. 6, 1945. M. MlTcHKo THREADING MACHINE Filed May 18, 1943 9 Sheets-Sheet l i INVENTOR 19a/tad 'Mz'hhlf BY i ATTORN EY THREADING MACHINE Filed May 18, 1943 9 sheets-sheet 2 ATTORNEY Feb. 6, 1945. M. MlTcHKo THREADING MACHINE Filed May 18, 1945 9 Sheets-Sheetl 5 www@ M. MITCHKO THREADING MACHINE Feb. 6, 1945.

9 sheets-sheet 4 l Filed May 18. 1945' INVEOR. /Ylrlzael @dz/:I0

ATTORNEY Feb. 6, 1945. M. MlTcHKo THREADING MACHINE 9 sheets-sheet 5 Filed May 18, 1943 ATTORNEY Feb. 6, 1945. M. MITCHKO 2,368,720

THREADING MACHINE Filed May 18, 1945 9 sheets-sneu e SQLG 'II mi fr# A I .IE Y",

L5 i l I xl 1, E' u l s g s k INVENTOR Feb. 6, 1945.

M. MITQHKO THREADING MACHINE Filed May 18, 1945 9 Sheets-Sheet 7 ATToiQNEY Feb. s, 1945. M. MITCHKO 2,368,720

'THREADING MACHINE Filed May 18. 194?? 9 sheets-sheet 8 INVENTOR.- u/fael Feb- 6, 1945. M. MITCHKO 2,368,720

THREADING MACHINE AFiled May 18, 1943 9 Sheets-Sheet 9 Patented Feb. 6, 1945 l I UNITED. STATES] PATE THREADING MACHINE Michael 4Mitchko, Irvington, N. assignor to J. Brooks Company, Newark, N. .I., a corporation ofgNew Jersey Application May 18, 1943, Serial-No. 487,499

- 2 Claims'. K, (.01. zia-241') This invention relates to threading devi-ces` for .threading a .double strand into and reverselyloa'ck vthrough one or more sealing elements, and hasfor its main object and: feature' the lproduction of aA device for accomplishing this in `a more facile? Imanner than heretofore vand by much simpler means than those formerly employed.

In'the accompanying drawings, the invention is shown inv a concrete and 4preferred form 'in which: l

Fig. l isa top plan view', partly .broken away, ofar machine `embodying the invention;

Fig. 2 is a horizontal sectional view substan- Fig. 8 is. a vertical sectional view substantially l on the plane of line 8 8 of Fig. 7;

Fig. 9- is a vertical sectional view substantially on the plane of line 9-9 of Fig. 7; Y

Fig. 10.l is a detail plan Viewy of the central portion of Fig. 1, with parts broken away and in section; I

Fig. 11 is a vertical sectionall view substantially on the plane of line lI-Il of Fig.

Fig. 1'2 is a vertical sectionalview substantially on the plane of line |.2,-l.2 of Fig. 10;

Fig. 13 is a fragmentary vertical sectional View substantially on the plane of .line |3-I3 of Fig. 10.;

Fig. 14 is afragmentary verticalr sectional view substantially on the vplane of line I 4-I4 of Fig. 10.;

Fig. l5 is a fragmentary verticalv sectional view substantially on the plane of line Iii-l5 of Fig.

Fig. l6.is aperspective detail view of the hold.- ing. dog for .the sealguard;

Fig. 17 is a-perspective detail view oflthe stripper or deflecting .mechanism for the threaded strand` of. the sealassemblage;

Fig..l8 is a plan view of the die-face of the upper threading die.;l

I' Fig. 19 is av plan view of the die-face of the lower threading die;

Figs. 20to 2.4 inclusivefareaseries of perspective. views, somewhat diagrammatic,l to illustrate on the'plane of line 30-30'of.Fig. 32;

.-of. arrow 3 lr of Fig. 32;; andl the successive steps in the threading of the-seal; Fig., 25 is a perspective view of thejthreaded se assemblage producedby themachine;

Fig. `26 isa. perspective view,l partly broken away, Vof the lower'threading. die Fig. 27 is a fragmentary perspective View ofth upperthreading. die; 1 l

Fig. 28 is a fragmentary plan view right-hand corner of Fig. l;

Fig. 29 is a detail sectional view substantially on the planeof linez29-29 of Fig. 28;v

Fig.. 30 is a 'sectional detail view substantially ofthe upper Figjlr is a detail view looking in the direction Fig. 32 is a, 'sectionaldetailview substantially lon'the plane of line 32-,32 of Fig. 30.

`Attention is rst ldirected-to 25fwhich shows a sealingmeans such as 4is disclosedqi-n U. S. Letters Patent, to Bro0ks,No.--2,163-,660,.of June 27, 1939. The sealingtmeans here consist of a perforated member` Ivof compressible material such. as lead, and a perforated so-calledv gripping .and severing member or guardi-'of non-compres- ,sible material such as sheet steel, but, if Idesired,

member 2. can be omitted.. The strand, such as a exible cord of fibrous material,A .is indicated jat 3. It', will facilitate the explanation and understanding` of the machine that is to ;be presently 4described if the major stages `of operation are 20 to 25 inclusive will be utilized.

Sealing means I or I and Z'being placed in position in the machine, strand is fed into the device in a direction at rightangles to its-subsequent movement. 4 indicatesa, circular and oscillatory member that lconstitutes a loop-forming and feeding means,Y it being provided with a thread-receiving .groove 5,pafrallel to its axis of oscillation, for the reception of the central portion of' strand 3 (Fig. 20) andwithcircumferen tial loop-forming grooves 6.. Rotation of member 4 in the direction indicated irl-Fig.` 21 drawsthe .outerportions of thes'trandgintov grooves Brand considered at this point, nd for this'purpose Figs.

,forms said strand into an open loop'L or double. strand with its free. ends LI., pointing towardseal are threadedback through-central opening liof NT oFFl-'c'iEf f guard 2 and through the two inner openings I2 i. of seal I (Fig. 23). This completes the threadingi operation, and the threaded seal assemblage is then discharged from the machine (Fig. 24).

1 The instrumentalities for carrying out the above-described operations will now be explained. Strand 3 can be fed from any suitable source such as a reel (not shown) and enters the Inachine from the left-hand side as viewed in Figs.

1, 3 and '1. The means for accomplishing this may vary but, in this instance, a reciprocatory l feed device, generally designated by A, is employed. I 4 indicates a track on which carriage I5, v

of devicejA, slides, and I6 is a picker pin (Figs. 3, 30, 31 `and 32) carried by carrier I5 that enunit2ll to shaft 2l carrying pinion 22. Referring now toFigs. 1, v2` and 3, said pinion 22 meshes witha gear 23 on shaft 24, which latter carries at its other end a pinion 25 that meshes with a gear-s26 on shaft'21. Any suitable means can be employed to reciprocate carriage I from shaft 21 but,1'in the present instance, these means take the following form: .Pivotally supported at 28 is n an oscillatory member or connection 29, the upper end of which is' provided with a slot 36 in which engages a roller 3| mounted on carriage I5. 32 indicates aroller slidably mounted in slot 33 of connection 29, and this roller 32 also 'travels in slotted'guide 34 of shaft 21 or gear l26. It will be understood that rotation of guide 34 imparts an oscillatory motion to connection 29, which latter, in turn, effects reciprocation of carriage I5.

Referring to Figs. 7, 8 and 9, as well as to Figs. 1, 2 and 3, the'reference character B indicates, generally, means for severing a length of strand from thesource of supply, after said length of strand'has been fed across the machine. severing means, as such, consist essentially of a stationary knife 35 and a movable knife 36 and actuating means for the latter. In the present instance, such actuating'means take' the following form: Knife 36 is mounted on' a rockshaft 31, vwhich latter is rocked by pivotally and slidably connected links 38 and 39. Link k3$lis carried by a reciprocatory member 40,'s1idably mounted in Ythe framework, and normally held in its upper position by rotating cam 4I. This cam has a vvsharp drop at 42 to effect a quick severing move'- Vment of movable-knife 36. Cam 4I is mounted on shaft 43 which is driven from shaft 21 by means of a pair of bevel gears 44. 45 indicates a holding device to preventthe leading end 3a, of the next vstrand to be severed, from slipping out of the v machine. y rllhis holding device is a pin, pivotally The . gages strand 3l and places it in transverse groove I1 of tabley I8 (Figs. 1, 3 and 7), which groove I1 that transmits the reciprocating movement cf' rack 49 to eiect oscillation of shaft 48'that carries member 4.' When member 4 turns in one di `rection, strand 3 is drawn into circumferential grooves 6 (Fig. 21), and, uponv reversal of its direction of movement, the free ends LI of the double strand or loop L are threaded through the sealing means. It is pointed out here that member 4 constitutes the sole feeding means employed in threading and reversely threading the strand through the sealing means, as will presently appear more clearly.

Perforated sealing member I can be introduced into themachine in any suitable manner. As here'shown, 59 (Figs. 1, 3, 4 and 10) indicates a chute through which the seals are fed, by hand or otherwise, one by one, into position to receive the strand. When so introduced, seal I (Figs. 10, 11 and 12) lies on lower guide die `60 and between the latter and upper guide die 6I.

Guard member 2, if used, is intrcduced'into the machine through a chute 62 (see particularly Figs. 10, 1l, 12 and 13) that is pivotally supported at 63 in a bracket 64 -carried by upper guide die 6I. Upper guide die 6I has an up-anddown motion, to be presently described, and this up-and-down motion is utilized, to swing chute 62 on pivot 63 to thereby feed one guard 2 at a time into threading position, by the following means: 65 indicates a cam pivotally supported at 66 on lower guide die 60, and 61 indicates an arm carried by chute 62 to engage said cam 65. It will be seen that, when upper guide die 6I moves down toward lower guide die 60, chute 62 will swing toward the left, as viewed yin Fig'. 12, and the lowermost guard 2 in the stack will therefore dropinto position on guard support 68. 16 denotes va holding dog carried by lower guide die normally urged into a retracted position Aby pull-spring 1I and moved into an advanced position by Ameans of a cam rod 12 that engages cam 13 on dog 10. Theholding dog, when in its forward position (Fig, 1'2), engages the inside of guard 2. Guard support 68 and cam rod12' both have reciprocating movements. Upper guide die 6I is moved up'and 'down by means of rods 14. Turn now to'Figs. 1, 3 and 4, as well as -to Figs. l0, l1 and l2, for an explanation of the means for actuating 68, 1,2 and 14. Mounted on shaft 21 is a cam 15 with which engages a cam roll 16 carried by sliding frame 11. This frame supports rods 14 that slide in bushings 18 of the framework, and said rods are connected to the upper guide die 6I by means of nuts 19. Frame 11 has an extension 86 that engages spring 8| surrounding guard support 68 and interposed between said yextension `SI'I and a collar 82. f Thus, when the upper guide die 6I is moved upwardly (Fig. 4), guard support 68 is likewise elevated, land, as this occurs after the strand has been threaded and reversely'v threaded through the sealing means, the threaded assemblage is freedvfrom lower guide die 60 by the action of guard support 68 againstthe guard of the threaded assemblage.

-*Also mounted on shaft 21 is another cam 83 that engages lower end 84 of cam rod 12 tolift gagement 'with' guar'd`2. f It will Abev understood position. that is.: when. the

the right viewed. in 1 the lonerinost Yguard 2.

'into position on guard Aimport 68.. itpleeihg oreventedjfrom so doing by ledge. $5 of the upper n guide die.

Referring now particularly to Figs. 18, ,19, 2 6 and 27, as Well as to Figs. 1, 4, 10, 11, 1 2, Y13, 14 and. V1.6, the :means for revers/hie the direction of movement of: 4.free 'ehdsLI of the looped. double strand will be described. As orevioilslynointed out. 5.0 indicates .lower guide die. and 6| unser guide die-Which. .letter .is .liited and low:- ered lov the `already recited, which oonsist generally ofl members 11.4. and the' a tu devioes.- 1 -hose guide Vdies when their .closed .upper guide die. is do. against the. .lower guide die, `form guiding e .ehrlels provided with elliptical portions for reversing the direction of movement .of the. free 'l ends of the .strax-identite rethread them through the sealing. means. That. free end LIv of the I .looped strand, that. passesy through oney perforation. 'I of. member I and perforation. 8 of guard enters the guide dies through oneningilt. (Figs.

19 and 26.) and.. aiter having its. direction re.- versed, emerges. through. opening 8l.. .ndisthen threaded through center opening Il. ofguardl eine through one of oerieratiohs I2 of men-.iberi- .The other free ehdlLI of; the .leoneol strand. that ,1

Passes .through thel otherV perforation .1 of mem.- ber I .andV through perforation 8 of guard 2, enu ters the. `guide. dies through opening4 .8.8 and. after. having its direction. reversed, emerges through oper-ling. te and is theo yth.resided Center opening .II of guard 2 and through one-of perforations I2 of member I. Stiodoates. (Eig. 13) one channel through which one free. end LI of the strand travels at one level and 9| indicates the other channel through which the other free end LI travels at another level. Two features are to be noted in connection with these guide dies and their channels. One is that they are non-propelling-thiat, is to say: they have no feeding means that engage and movethe strands;

the other is that the strand ends are reversed` by traveling through elliptical portions of the channels-that is .to say: the strand ends are not forced into a semi-circular path. In other words: all the feeding is done by member 4 located at one side of sealing member I when in threading position, and the reversing means, consisting of the guide dies and their channels,l located on the other side of said member I, merely guide or direct, without propelling, the free ends` of the strand. Lower1 guide die 60 is provided with a central guiding member 92,111 which holding dog IU slides, having a wall 93 that extends partially around said member 92 at one side thereof, which W-all S3 separates channels 90 and 9| at that side of member 92. 94 indidates another Wall, at the other side of said member 92, but in spaced relation to the latter, and separates channels 90 and 9| .at that side of central guide 92. Upper guide die 6I (shown in an inverted position in Fig. 18 Iand a portion thereof in perspective in Fig. 27) is provided with complementary walls 95 and 99 that form curved non-semi-circular end portions or continuations of channels 99 and 9| and have as shown a curvature of lesser ydegree than that of a semicircle. Said guide dies are also provided with openings 91 land 98 through which guard member 2 passes.

It is now the time to return to a consideration the stack. .oor-mot drop- Hpermits spring 4IIIA-to bring otzoarriago.' I 5.`:theinstrumentoltiesfearned there .bri .and *the lirneans operated by traversa Qonsnltinow Figs., Y28;?00'.132inclusive, as welles Figs. '1, i3,` 4. 19,. .1.1,l `12 .and 17. As previously .pointed-out, li indicates a needle. to .engage .and fdisengage :strand verticallyfslidable member|411);movable` in brackdirection (asviewed Ai 1,1li'ig. 1).stop |105 pushes |133, .and movesv it into the position g;- :3Q,.:therebycausingpin I6 to er1.-

W n .carriage I5 comes tothe gage strand .i '.31 lghtfhanddirection las Fig. 1 ,'.stop .I 0.6 pushes against cam and .allsesnin 1.6.: to disengagestrahd 3.a length or which newY lies groove I1. of table la and groove 5- oi cylinder 4 (Fig. x20). `m1 indiestes a strippen slidingly' mounted .in guides Los ei .table I8.. and provided..A witntwo inclined des eQ-thg groeven. 10.8 t0 receive free ends'LI, .of the Vretntnii1-g st nd.; .as theyy emerge from .perfolbrOhS, l2 .0f .Sealing member I,at .Ia between the upper @hd lower guide dies.. The free ends TL!! are. thereby' carried above. the. plane. of memvyfl'igs. 1.5;,l 1 7- and 24), and this ...ich 'also assists. in freeing.. the` threadedf assemblage from the elements of the machine. Said stripper is provided with a piny IID to engage in slot III of cam lever I I2 pivoted at |I3, which lever II2 is urged into the position shown in Fig. 10 by means of spring |I4. Stop |I5 (Figs. 1 and 28) is carried by arm IUI of carriage I5 to engage cam lever I|2 during the traverse of said carriage I5. When carriage I5 moves to ythe right, as viewed cam lever II2 to retract stripper |01 against the tension of spring `I I4 to clear the Way for the ejection of the threaded assemblage, to be presently described. On the return stroke of carriage I5, to the left as viewed in Fig. 1, stop |I5 again retracts cam lever 2, but this is an idle motion devoid of function. IIB is lan ejector member' pivotally supported at II 'Ion carriage I5 and carrying a pendent lever I|8 to engage stop I I9 (Figs. 1, 4 and 28). |20 is a spring that normally holds ejector IIE in the position shown in Fig. 1. When carriage I5 advances from its left-hand position to its right-hand position (as viewed in Fig. 1), pendent lever II8 encounters stop H9, thereby imparting la swift ejecting movement to ejector IIB to thereby eject the threaded assemblage into chute I 2l and thus out of the machine. On the stroke of carriage I5 in a left-hand direction, as viewed'in Fig. .1, lever I I8 yields when it encounters stop ||9, and does not actuate ejector IIB.

The general follows:

At the beginning of a cycle of movements of the machine, the guide dies are in their open position, upper guide die 6I being in an upper position, and the threaded assemblage, produced .moves it into position shown in Fig. 3,1

in Fig.V 1, stop I I5 will engage operation of the machine is as Carriage I being in viewed. in Fig. 1, needle and carriage I5 begins its ing member 4, after which pin I6 disengages holding dog 10 has been retracted bythe lowerby the action of spring 1 I its left-hand position, as,v I6 now engages strand 3 traverse to the right, as viewed in Fig. 1, thereby laying strand 3 in groove I1 of table I8 and in groove 5 of voscillating of cam rod 12 and strand. When the strand has been so laid, it is cut oil? from the supply byk severing knife 36.

carriage, engages cam lever II2 and retracts stripper formed assemblage, and now stop yH9 actuates ejector IIB and ejects said previously formed assemblage onto discharge chute I 2l. Looping and feeding device 4 begins its backward rota tion to form the strand into a loop, sealing member I is fed into threading position, and upper guide die 6I descends, thereby bringing the guide dies into closed position. `The descending movement .of upper guide die 6I releases a guard 2 and drops it on guard support 68, which latter is'now in its lower position,Y and holding dog 1.0 moves into engagement with guard 2 under the inuence of the rising movement of cam rod 12.

Looping and feeding device 4 reverses its rota-A tion and advances free ends LI of the double strand into the sealing and guard members I` and 2 and into the guide dies, and as said device 4 continues its feeding movement of the double strand, guide dies E0 and 6I reverse the direction of free ends LI of said strand and rethread them through guard 2 and .sealing member I.

When free ends LI emerge, after being rethread- |01, thus entirely freeing the previously the l During the transit of carriage I5 to the right,

n as viewed in Fig. 1, stop II5,`on arm IUI of said u! cam rod 12.

lportions of the ed, they passup the incline of stripper I01, the

Vguide dies open by the rise of upper guide die 6 I, guard support 68 rises, and dog 10 is retracted by itsspring 1I by reason of the lowering of v Meanwhile, 'carriage I5 has returned to its position to the left, as viewed in Fig. l.

I claim: Y l

l. In a threading machine in which a looped double strand is to'be threaded and rethreaded through a perforated sealing member, the combination with feeding means, located wholly on one side of the sealing member when in threading position, to advance the looped strand with the freev ends thereof vtoward and through the sealing member; of non-propelling guiding dies, located on the other side of the sealing member when in threading position, having guiding channels provided with curved nonfsemicircular end portions, having a curvature of lesser degree than that of a semi-circle, for reversing the direction of movement of the 'free ends of the strand and. to rethread them-through the sealing member.

`2. In a threading machine, the combination material to lay the central portion thereof in said thread-receiving groove; and actuating devices and connectionsl to turn the oscillatory member first in one direction to'draw the outer strand into the vcircumferential grooves to thereby form Va looped double strand, and to thereafter turn the oscillatory member in the other direction to feed said double strand out of the circumferential grooves.

MICHAEL MITCHKO. 

